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Level 3

812 points

fs tree invalid on APFS

hello,

while doing a first-aid check on my macOS APFS volume, I get the following message in the details as it scans the volume. it is

Checking the fsroot tree.

error: drec_val object (oid 0x51b169): invalid type (0)

fsroot tree is invalid.

The volume /dev/rdisk1s1 could not be verified completely.

can anyone who's knowledgeable with this type of error provide some info about what this error is, whether it's a concern or not ?

MacBook Pro (Retina, 15-inch, Late 2013), macOS Sierra (10.12.4), 2.0 GHz/16GB/256GB

Posted on Oct 1, 2017 3:41 PM

32 replies

Level 1

21 points

This solution worked for me. Thanks jannymark!

I restored from my most recent High Sierra (10.13.2) Time Machine backup.

The restoration process took about three hours.

Glad to hear it worked.

fs tree invalid on APFS